Protecting the ozone layer.
Simons
D G
DG
Travell
J G
JG
Simons
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LS
D000336:Aerosols; D000397:Air Pollution / Q000517:prevention & control*; D005617:Chlorofluorocarbons, Methane / Q000008:administration & dosage*; D005018:Ethyl Chloride / Q000008:administration & dosage*; D006801:Humans; D009209:Myofascial Pain Syndromes / Q000534:rehabilitation*
D000336:Aerosols; D005617:Chlorofluorocarbons, Methane; C013534:fluori-methane; D005018:Ethyl Chloride